\chapter{一元二次方程}

\section{一元二次方程}
\input{units/czds3-ch11-subsec1}
\input{units/czds3-ch11-subsec2}
\input{units/czds3-ch11-subsec3}
\input{units/czds3-ch11-xiti5}

\input{units/czds3-ch11-subsec4}
\input{units/czds3-ch11-xiti6}

\section{一元二次方程的根与系数的关系}
\input{units/czds3-ch11-subsec5}
\input{units/czds3-ch11-subsec6}
\input{units/czds3-ch11-xiti7}

\section{可化为一元二次方程的方程}
\input{units/czds3-ch11-subsec7}
\input{units/czds3-ch11-subsec8}
\input{units/czds3-ch11-subsec9}
\input{units/czds3-ch11-xiti8}

\section{简单的二元二次方程组}
\input{units/czds3-ch11-subsec10}
\input{units/czds3-ch11-subsec11}
\input{units/czds3-ch11-subsec12}
\input{units/czds3-ch11-xiti9}

\input{units/czds3-ch11-xiaojie}
\input{units/czds3-ch11-fuxi}

